Terminal fault problem causes and solutions of frequency converter, rounding -

by:Coolmay     2020-06-28

1, test '+ 24 v' and 'PLC' terminal connection between the short jumper? Is there a dislocation connection ( Connected to the other terminal) 吗?

2, pick the X1 - using a wire short - - - - - - U0 - X7 and COM terminal, inspection The parameters of the 18, whether the corresponding terminal input action;

if there is no change, only one terminal is basic to judge the damage of a terminal, can use other terminal to debug.

3, '+ 24 v' and '. com 'whether there is a 24 VDC, between the multimeter dc gear, there should be a 24 v voltage. If '+ 24 v' and '. com 'between voltage is normal, then the following inspection, otherwise the basic on the judging panel has a problem;

4, '+ 24 v' and 'PLC' tighten terminals between the short jumper? If the short jumper drops or is not tight, guide the X1 - - - - - - - X7 terminal is invalid, especially outside the inverter '+ 24 v power supply, be sure to put the two screw tight, all because of the short jumper connecting the two terminals, there is only one terminal tight, under the condition of short jumper will not fall off, but can lead to '+ 24 v' terminal is not connected with' PLC terminals, also can cause the X1 - - - - - - - X7 terminal input is invalid.

5, if the test is correct, terminal is not running, you need to check the parameter Settings, B1 - 00 = 1,C0 - 01 = 3 parameters such as set up the correct?

note: the old version of software ( B12 and previous version) In frequency converter fault, and after reset, terminal even sub state, frequency converter also won't run, need to put the terminal to dismantle, back in ( There is a rising along the signal) Will run again; The new software, Bl3 version) Factory default to keep the old version software functions, but can be by parameter Settings ( C0 - 21 = 1) , after the fault reset, if the terminal state run the command in a short, can run directly, this feature with caution, please, lest appear dangerous.

processing flow chart is as follows:

a, the connection mode of dry contact 1, dry contact connection mode, the internal power supply ( '+ 24 v' and 'PLC' short jumper must be reliable connection, can provide multi-function input terminal power supply) :

2, dry contact connection mode, USES the external power supply ( '+ 24 v' and 'PLC controller' short jumper must be demolished, external power supply '+', from 'PLC' terminal, after the external contact, and then access terminal 'X') :

2, 1, the connection mode of open collector open collector NPN connection mode:

A, open collector NPN connection mode, using the internal power supply ( Due to internal power, so '+ 24 v' and 'PLC' short jumper must be reliable connection, and the flow of electric current from the + 24 v 'to' PLC 'in internal sorting circuit control board, and then to' Xi 'terminal, after the external contacts back in the'. com 'terminal of frequency converter) :

B, open collector NPN connection mode, using an external power supply ( Because use external power supply, so '+ 24 v' and 'PLC' short jumper must be pulled down, and the flow of electric current from the external power supply '+' to 'PLC' in internal sorting circuit control board, and then to 'Xi' terminal, after the external contacts back to external power supply '0 v' terminal) :

2, open collector PNP connection mode:

A, open collector PNP connection mode, using the internal power supply ( Because with internal power, and the flow of electric current from the + 24 v 'to external contact, back to the terminal' Xi ', through the control panel back to 'PLC' terminal after the rectifier circuit, so the inverter '+ 24 v' and 'PLC' terminal short jumper needs to dismantle, and terminal 'PLC' and '. com 'terminal short pick up) :

B, open collector PNP connection mode, using an external power supply ( Due to external power supply, and the flow of electric current for from an external power supply '+', through the external contact, return to 'Xi' terminal of frequency converter, through internal rectifier circuit control board, go back to 'PLC' terminal, so the external power supply '+' receives the external contacts, external power supply '- 'PLC' terminal 'received inverter, the inverter itself' + 24 v 'to' PLC controller 'short jumper must dismantle) :

note: all these contacts, whether it is how to connect, can form a loop circuit needs to be considered?

the flow of electric current according to difference of NPN ', 'PNP' will flow through?

3, inverter multifunctional output terminal connection 1, open collector Y1, Y2:

a) Using the internal power supply

b) The use of external power supply

note:

A, pull-up resistors selection: need to choose according to the power capacity, our internal '+ 24 v power supply capacity of 200 ma, so the minimum resistance is 120 euro, usually selected for about 2 k, but as A PLC pulse input, need according to the PLC input terminal impedance matching;

B, multi-function input terminal is good or bad judgment: under the condition of without conduction, '+ 24 v' and 'Y1, Y2' there is no voltage between, in the case of conducting '+ 24 v' and 'Y1', there are 24 v voltage between 'Y2'.

2, relay output wiring:

a) Using the internal power supply

b) The use of external power supply

note: please pay attention to the '+' and 'relay coil - 'Can't meet the.


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